Is it possible to Use a PIR sensor to help on blind spot issue ?

I was thining of doing something that would help me on the blind spot issue.
So i would like to know if using a PIR sensor (from presence detection stuff) that would light up a led light on my side mirror would be an option.
Is it possible to use something like these to do what i am talking about ?
If not, since i dont have a radar, what would could be done ?
Thanks!